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LiPF6 solution

A solution and solvent technology, applied in LiPF6 solution and its electrochemical storage device, can solve the problem of destroying deployment

Inactive Publication Date: 2014-10-01
LANXESS DEUTDCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the NaH proposed therein does not react very rapidly, it has a huge disadvantage, namely, the sodium ions introduced into the solution due to its use can destroy the subsequent LiPF 6 Solution deployment (deployment)

Method used

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  • LiPF6 solution

Examples

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Comparison scheme
Effect test

example

[0051] In the following, "%" is always understood to mean % by weight.

[0052] The described examples, unless otherwise stated, were performed in an argon atmosphere (containing <0.1 ppm water and <0.1 ppm oxygen).

[0053] Measure the concentrations of hexafluorophosphate and fluoride using an ion chromatograph with the following parameters:

[0054] Instrument model: Dionex ICS2100

[0055] column: AS202*250-mm "Analytical Column with guard"

[0056] Sample volume: 1μl

[0057] Eluent: KOH Gradient: 0min / 15mM, 10min / 15mM, 13min / 80mM, 27min / 100mM, 27.1min / 15mM, 34min / 15mM

[0058] Eluent flow rate: 0.25ml / min

[0059] Temperature: 30°C

[0060] Self-regeneration inhibitors: 300(2-mm)

[0061] Reduction of free fluoride values ​​by neutralization:

example 1

[0063] 10.26g of 16.88% LiPF 6 A solution in acetonitrile (dried over molecular sieves and having a free fluoride content of 1.91%) was mixed with 43.9 mg of lithium metal (in the form of pellets with a diameter of about 1-2 mm). After 15 hours, a sample of the solution was taken, filtered through a syringe filter with a pore size of 200 nm and analyzed. The fluoride content of the solution was reduced to 0.73%.

example 2

[0065] 11.01g of 16.88% LiPF 6 A solution in acetonitrile (dried over molecular sieves and having a free fluoride content of 1.91%) was mixed with 5.06 g of alumina (from St-Bobain-Norpro, SA62125) and then with 226.6 mg Lithium carbonate mixed. After 15 hours, a sample of the solution was taken, filtered through a syringe filter with a pore size of 200 nm and analyzed. The fluoride content of the solution was reduced to 0.32%.

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Abstract

The invention relates to low-corrosion, low-halide LiPF6 solutions and to the use thereof in electrochemical storage devices and for producing the same.

Description

technical field [0001] The present invention relates to LiPF 6 Solutions and their use in electrochemical storage devices or their manufacture. Background technique [0002] The popularity of portable electronic devices such as laptop and palmtop computers, mobile phones or video cameras all over the world in recent years, and thus also the demand for high-power and light-weight batteries, has increased dramatically. Furthermore, batteries of this type will also be required for electric vehicles in the future. [0003] In view of this sudden increase in demand for batteries and the associated ecological concerns, the development of rechargeable batteries with a long life is becoming increasingly important. [0004] Rechargeable lithium-ion batteries have been commercially available since the early 1990s: most of these rechargeable batteries use lithium hexafluorophosphate as the conductive salt. However, such lithium salts are extremely sensitive to hydrolysis and lack th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/455C01D15/00
CPCC01B25/455C01D15/005Y02E60/10C01D15/00H01M10/0568
Inventor 马蒂亚斯·博尔沃尔夫冈·埃文贝克埃伯哈德·库克特
Owner LANXESS DEUTDCHLAND GMBH